Publications (10)
H-alpha observations of zeta Tauri
E. Pollmann, Th. Rivinius
We report H-alpha observations of zeta Tauri, taken between late 2000 and early 2006. Next to extending existing long-term montioring of the disk state of this star we report an in…
The relationship between gamma Cassiopeiae's X-ray emission and its circumstellar environment
M. A. Smith, R. Lopes de Oliveira, C. Motch +17
γCas is the prototypical classical Be star and is best known for its variable hard X-ray emission. To elucidate the reasons for this emission, we mounted a multiwavelength campaig…
Cyclic variability of the circumstellar disk of the Be star zetaTau - I. Long-term monitoring observations
S. Stefl, Th. Rivinius, A. C. Carciofi +9
Emission lines formed in decretion disks of Be stars often undergo long-term cyclic variations, especially in the violet-to-red (V/R) ratio of their primary components. From observ…
Dynamic Growth/Etching Model for the Synthesis of Two-Dimensional Transition Metal Dichalcogenides via Chemical Vapour Deposition
E. Pollmann, A. Maas, D. Marnold +5
The preparation of two-dimensional transition metal dichalcogenides on an industrially relevant scale will rely heavily on bottom-up methods such as chemical vapour deposition. In…
The 2011 Periastron Passage of the Be Binary delta Scorpii
A. S. Miroshnichenko, A. V. Pasechnik, N. Manset +19
We describe the results of the world-wide observing campaign of the highly eccentric Be binary system delta Scorpii 2011 periastron passage which involved professional and amateur…
Gas dependent hysteresis in MoS field effect transistors
F. Urban, F. Giubileo, A. Grillo +10
We study the effect of electric stress, gas pressure and gas type on the hysteresis in the transfer characteristics of monolayer molybdenum disulfide (MoS2) field effect transistor…
Apparent Differences between Single Layer Molybdenum Disulfide Fabricated via Chemical Vapor Deposition and Exfoliation
E. Pollmann, L. MadauÃ, S. Schumacher +6
Innovative applications based on two-dimensional solids require cost-effective fabrication processes resulting in large areas of high quality materials. Chemical vapour deposition…
Evolution of the disk of pi Aqr: from near-disappearance to a strong maximum
Y. Naze, G. Rauw, J . Guarro Flo +30
Some Be stars display important variability of the strength of the emission lines formed in their disk. This is notably the case of pi Aqr. We present here the recent evolution of…
Doppler tomography of the circumstellar disk of Ï Aquarii
S. V. Zharikov, A. S. Miroshnichenko, E. Pollmann +17
The work is aimed at a study of the circumstellar disk of the bright classical binary Be star Ï Aqr. We analysed variations of a double-peaked profile of the Hα emission line in…
Electron irradiation of metal contacts in monolayer MoS Field-Effect Transistors
A. Pelella, O. Kharsah, A. Grillo +9
This work deals with the electron beam irradiation of the Schottky metal contacts in monolayer molybdenum disulfide (MoS) field-effect transistors (FETs). We show that the expo…